diff --git a/ChangeLog b/ChangeLog
index 53be8e4f9b..5a1bc8e600 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,13 @@
+Sat Nov  5 13:42:50 2005  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* configure.in, cygwin/GNUmakefile.in (mingw): use def file to alias
+	  symbols.  [ruby-dev:27532]
+
+	* bcc32/mkexports.rb, win32/mkexports.rb: make aliases in DLL.
+
+	* win32/win32.c, win32/win32.h: replace symbols only when RUBY_EXPORT
+	  is defined.
+
 Thu Nov  3 07:57:39 2005  Minero Aoki  <aamine@loveruby.net>
 
 	* lib/open-uri.rb (open_loop): find_proxy should return nil when
diff --git a/bcc32/mkexports.rb b/bcc32/mkexports.rb
index e34b441e2f..1b498f8515 100644
--- a/bcc32/mkexports.rb
+++ b/bcc32/mkexports.rb
@@ -1,25 +1,24 @@
 #!./miniruby -s
 
-SYM = {}
-STDIN.reopen(open("nul"))
-ARGV.each do |obj|
-  IO.foreach("|tdump -q -oiPUBDEF -oiPUBD32 #{obj.tr('/', '\\')}") do |l|
-    next unless /(?:PUBDEF|PUBD32)/ =~ l
-    SYM[$1] = true if /'(.*?)'/ =~ l
+$:.unshift(File.expand_path("../..", __FILE__))
+require 'win32/mkexports'
+
+class Exports::Bcc < Exports
+  Forwards = /^rb_w32_(\w+)/
+
+  def forwarding(internal, export)
+    internal[/\A_?/]+export
+  end
+
+  def each_export(objs)
+    objs.each do |obj|
+    opt = /\.(?:so|dll)\z/i =~ obj ? "-ee" : "-oiPUBDEF -oiPUBD32"
+    IO.foreach("|tdump -q #{opt} #{obj.tr('/', '\\')} < nul") do |l|
+      next unless /(?:PUBDEF|PUBD32|EXPORT)/ =~ l
+        yield $1 if /'(.*?)'/ =~ l
+      end
+    end
+    yield "_strcasecmp", "_stricmp"
+    yield "_strncasecmp", "_strnicmp"
   end
 end
-
-exports = []
-if $name
-  exports << "Name " + $name
-elsif $library
-  exports << "Library " + $library
-end
-exports << "Description " + $description.dump if $description
-exports << "EXPORTS" << SYM.keys.sort
-
-if $output
-  open($output, 'w') {|f| f.puts exports.join("\n")}
-else
-  puts exports.join("\n")
-end
diff --git a/configure.in b/configure.in
index c58b3ca2f7..7209f0a592 100644
--- a/configure.in
+++ b/configure.in
@@ -1370,11 +1370,11 @@ case "$target_os" in
 	esac
 	;;
     cygwin*|mingw*)
+	LIBRUBY_DLDFLAGS="${DLDFLAGS}"' -Wl,--out-implib=$(LIBRUBY)'
 	case "$target_os" in
 	cygwin*)
 	    if test x"$enable_shared" = xyes; then
 		LIBRUBY_SO='cyg$(RUBY_SO_NAME)'${MAJOR}${MINOR}.dll
-		LIBRUBY='lib$(RUBY_SO_NAME).dll.a'
 	    fi
 	    AC_LIBOBJ([strftime])
 	    ;;
@@ -1382,7 +1382,7 @@ case "$target_os" in
 	    RUBY_SO_NAME=${rb_cv_msvcrt}-'$(RUBY_INSTALL_NAME)'${MAJOR}${MINOR}
 	    if test x"$enable_shared" = xyes; then
 		LIBRUBY_SO='$(RUBY_SO_NAME)'.dll
-		LIBRUBY='lib$(LIBRUBY_SO).a'
+		LIBRUBY_DLDFLAGS="${LIBRUBY_DLDFLAGS}"' $(RUBYDEF)'
 	    fi
 	    AC_LIBOBJ([win32])
 	    COMMON_LIBS=m
@@ -1390,11 +1390,12 @@ case "$target_os" in
 	    COMMON_HEADERS="winsock2.h windows.h"
 	    ;;
 	esac
-	LIBRUBY_DLDFLAGS="${DLDFLAGS}"' -Wl,--out-implib=$(LIBRUBY)'
 	LIBRUBY_ALIASES=''
 	FIRSTMAKEFILE=GNUmakefile:cygwin/GNUmakefile.in
 	SOLIBS='$(LIBS)'
-	if test x"$enable_shared" = xno; then
+	if test x"$enable_shared" = xyes; then
+	    LIBRUBY='lib$(RUBY_SO_NAME).dll.a'
+	else
 	    LIBRUBY_SO=dummy
 	    LIBRUBY='lib$(RUBY_SO_NAME).a'
 	    LIBRUBYARG='-l$(RUBY_SO_NAME)'
diff --git a/cygwin/GNUmakefile.in b/cygwin/GNUmakefile.in
index 03208df11c..c9283d84b1 100644
--- a/cygwin/GNUmakefile.in
+++ b/cygwin/GNUmakefile.in
@@ -28,6 +28,7 @@ WPROGRAM = $(RUBYW_INSTALL_NAME)$(EXEEXT)
 SOLIBS := $(DLL_BASE_NAME).res.@OBJEXT@ $(SOLIBS)
 EXTOBJS += $(@:$(EXEEXT)=.res.@OBJEXT@)
 RCFILES = $(RUBY_INSTALL_NAME).rc $(RUBYW_INSTALL_NAME).rc $(DLL_BASE_NAME).rc
+RUBYDEF = $(RUBY_SO_NAME).def
 
 ruby: $(PROGRAM)
 rubyw: $(WPROGRAM)
@@ -61,6 +62,11 @@ GNUmakefile:	$(srcdir)/cygwin/GNUmakefile.in
 
 ifeq (@target_os@,mingw32)
 $(OBJS) $(MAINOBJ): win32/win32.h
+
+$(LIBRUBY_SO): $(RUBYDEF)
+
+$(RUBYDEF): $(LIBRUBY_A) $(PREP) $(RBCONFIG)
+	$(MINIRUBY) $(srcdir)/win32/mkexports.rb -output=$@ $(LIBRUBY_A)
 endif
 
 ifeq (@target_os@,cygwin)
diff --git a/ruby.c b/ruby.c
index f3c7f88bd0..71d69625ac 100644
--- a/ruby.c
+++ b/ruby.c
@@ -12,7 +12,7 @@
 
 **********************************************************************/
 
-#if defined _WIN32 || defined __CYGWIN__
+#ifdef __CYGWIN__
 #include <windows.h>
 #endif
 #ifdef _WIN32_WCE
diff --git a/win32/mkexports.rb b/win32/mkexports.rb
index 3859381935..3cf8bc329e 100644
--- a/win32/mkexports.rb
+++ b/win32/mkexports.rb
@@ -1,30 +1,134 @@
 #!./miniruby -s
 
-SYM = {}
+module Config
+  autoload :CONFIG, "rbconfig"
+end
 
-objs = ARGV.collect {|s| s.tr('/', '\\')}
-IO.foreach("|dumpbin -symbols " + objs.join(' ')) do |l|
-  next if /^[0-9A-F]+ 0+ UNDEF / =~ l
-  next unless l.sub!(/.*\sExternal\s+\|\s+/, '')
-  if l.sub!(/^_/, '')
-    next if /@.*@/ =~ l || /@[0-9a-f]{16}$/ =~ l
-  elsif !l.sub!(/^(\S+) \([^@?\`\']*\)$/, '\1')
-    next
+class Exports
+  @subclass = []
+  def self.inherited(klass)
+    @subclass << [/#{klass.name.sub(/.*::/, '').downcase}/i, klass]
+  end
+
+  def self.create(*args, &block)
+    platform = RUBY_PLATFORM
+    pat, klass = @subclass.find {|pat, klass| pat =~ platform}
+    unless klass
+      raise ArgumentError, "unsupported platform: #{platform}"
+    end
+    klass.new(*args, &block)
+  end
+
+  def self.extract(objs, *rest)
+    create(objs).exports(*rest)
+  end
+
+  def self.output(output = $output, &block)
+    if output
+      open(output, 'w', &block)
+    else
+      yield STDOUT
+    end
+  end
+
+  def initialize(objs)
+    syms = {}
+    winapis = {}
+    internal = export = nil
+    each_export(objs) do |internal, export|
+      syms[internal] = export
+      winapis[$1] = internal if /^_?(rb_w32_\w+)(?:@\d+)?$/ =~ internal
+    end
+    win32h = File.join(File.dirname(__FILE__), "win32.h")
+    IO.foreach(win32h) do |line|
+      if /^#define (\w+)\((.*?)\)\s+(?:\(void\))?(rb_w32_\w+)\((.*?)\)\s*$/ =~ line and
+          $2.delete(" ") == $4.delete(" ")
+        export, internal = $1, $3
+        if syms[internal] or internal = winapis[internal]
+          syms[forwarding(internal, export)] = internal
+        end
+      end
+    end
+    @syms = syms
+  end
+
+  def exports(name = $name, library = $library, description = $description)
+    exports = []
+    if name
+      exports << "Name " + name
+    elsif library
+      exports << "Library " + library
+    end
+    exports << "Description " + description.dump if description
+    k = v = nil
+    exports << "EXPORTS" << symbols()
+    exports
+  end
+
+  private
+  def forwarding(internal, export)
+    internal.sub(/^[^@]+/, "\\1#{export}")
+  end
+
+  def each_export(objs)
+  end
+
+  def symbols()
+    @syms.sort.collect {|k, v| v ? "#{k}=#{v}" : k}
   end
-  SYM[l.strip] = true
 end
 
-exports = []
-if $name
-  exports << "Name " + $name
-elsif $library
-  exports << "Library " + $library
+class Exports::Mswin < Exports
+  def each_export(objs)
+    noprefix = ($arch and /^sh/ !~ $arch)
+    objs = objs.collect {|s| s.tr('/', '\\')}
+    filetype = nil
+    IO.popen(%w"dumpbin -symbols -exports" + objs) do |f|
+      f.each do |l|
+        if (filetype = l[/^File Type: (.+)/, 1])..(/^\f/ =~ l)
+          case filetype
+          when /OBJECT/, /LIBRARY/
+            next if /^[[:xdigit:]]+ 0+ UNDEF / =~ l
+            next unless l.sub!(/.*\sExternal\s+\|\s+/, '')
+            if noprefix or l.sub!(/^_/, '')
+              next if /@.*@/ =~ l || /@[[:xdigit:]]{16}$/ =~ l
+              l.sub!(/^/, '_') if /@\d+$/ =~ l
+            elsif !l.sub!(/^(\S+) \([^@?\`\']*\)$/, '\1')
+              next
+            end
+          when /DLL/
+            next unless l.sub!(/^\s*\d+\s+[[:xdigit:]]+\s+[[:xdigit:]]+\s+/, '')
+          else
+            next
+          end
+          yield l.strip
+        end
+      end
+    end
+    yield "strcasecmp", "msvcrt.stricmp"
+    yield "strncasecmp", "msvcrt.strnicmp"
+  end
 end
-exports << "Description " + $description.dump if $description
-exports << "EXPORTS" << SYM.keys.sort
 
-if $output
-  open($output, 'w') {|f| f.puts exports.join("\n")}
-else
-  puts exports.join("\n")
+class Exports::Mingw < Exports
+  def self.nm
+    @@nm ||= Config::CONFIG["NM"]
+  end
+
+  def each_export(objs)
+    IO.popen([self.class.nm, "--extern", "--defined", *objs]) do |f|
+      f.each {|l| yield $1 if / [[:upper:]] _(.*)$/ =~ l}
+    end
+    yield "strcasecmp", "_stricmp"
+    yield "strncasecmp", "_strnicmp"
+  end
+
+  def symbols()
+    @syms.select {|k, v| v}.sort.collect {|k, v| "#{k}=#{v}"}
+  end
 end
+
+END {
+  exports = Exports.extract(ARGV)
+  Exports.output {|f| f.puts exports}
+}
diff --git a/win32/win32.c b/win32/win32.c
index fc6b587b20..98d8f19a4f 100644
--- a/win32/win32.c
+++ b/win32/win32.c
@@ -2009,11 +2009,11 @@ is_readable_console(SOCKET sock) /* call this for console only */
 }
 
 static void catch_interrupt(void);
-static long 
+static int
 do_select(int nfds, fd_set *rd, fd_set *wr, fd_set *ex,
             struct timeval *timeout)
 {
-    long r = 0;
+    int r = 0;
 
     if (nfds == 0) {
 	if (timeout)
@@ -2056,11 +2056,11 @@ subst(struct timeval *rest, const struct timeval *wait)
     return 1;
 }
 
-long 
+int WSAAPI
 rb_w32_select(int nfds, fd_set *rd, fd_set *wr, fd_set *ex,
-	      struct timeval *timeout)
+	       struct timeval *timeout)
 {
-    long r;
+    int r;
     fd_set pipe_rd;
     fd_set cons_rd;
     fd_set else_rd;
@@ -2194,7 +2194,7 @@ StartSockets(void)
 
 #undef accept
 
-int
+int WSAAPI
 rb_w32_accept(int s, struct sockaddr *addr, int *addrlen)
 {
     SOCKET r;
@@ -2217,7 +2217,7 @@ rb_w32_accept(int s, struct sockaddr *addr, int *addrlen)
 
 #undef bind
 
-int 
+int WSAAPI
 rb_w32_bind(int s, const struct sockaddr *addr, int addrlen)
 {
     int r;
@@ -2235,7 +2235,7 @@ rb_w32_bind(int s, const struct sockaddr *addr, int addrlen)
 
 #undef connect
 
-int 
+int WSAAPI
 rb_w32_connect(int s, const struct sockaddr *addr, int addrlen)
 {
     int r;
@@ -2261,7 +2261,7 @@ rb_w32_connect(int s, const struct sockaddr *addr, int addrlen)
 
 #undef getpeername
 
-int 
+int WSAAPI
 rb_w32_getpeername(int s, struct sockaddr *addr, int *addrlen)
 {
     int r;
@@ -2278,7 +2278,7 @@ rb_w32_getpeername(int s, struct sockaddr *addr, int *addrlen)
 
 #undef getsockname
 
-int 
+int WSAAPI
 rb_w32_getsockname(int s, struct sockaddr *addr, int *addrlen)
 {
     int r;
@@ -2293,7 +2293,7 @@ rb_w32_getsockname(int s, struct sockaddr *addr, int *addrlen)
     return r;
 }
 
-int 
+int WSAAPI
 rb_w32_getsockopt(int s, int level, int optname, char *optval, int *optlen)
 {
     int r;
@@ -2310,7 +2310,7 @@ rb_w32_getsockopt(int s, int level, int optname, char *optval, int *optlen)
 
 #undef ioctlsocket
 
-int 
+int WSAAPI
 rb_w32_ioctlsocket(int s, long cmd, u_long *argp)
 {
     int r;
@@ -2327,7 +2327,7 @@ rb_w32_ioctlsocket(int s, long cmd, u_long *argp)
 
 #undef listen
 
-int 
+int WSAAPI
 rb_w32_listen(int s, int backlog)
 {
     int r;
@@ -2344,7 +2344,7 @@ rb_w32_listen(int s, int backlog)
 
 #undef recv
 
-int 
+int WSAAPI
 rb_w32_recv(int s, char *buf, int len, int flags)
 {
     int r;
@@ -2361,9 +2361,9 @@ rb_w32_recv(int s, char *buf, int len, int flags)
 
 #undef recvfrom
 
-int 
-rb_w32_recvfrom(int s, char *buf, int len, int flags, 
-		struct sockaddr *from, int *fromlen)
+int WSAAPI
+rb_w32_recvfrom(int s, char *buf, int len, int flags,
+		 struct sockaddr *from, int *fromlen)
 {
     int r;
     if (!NtSocketsInitialized) {
@@ -2379,7 +2379,7 @@ rb_w32_recvfrom(int s, char *buf, int len, int flags,
 
 #undef send
 
-int 
+int WSAAPI
 rb_w32_send(int s, const char *buf, int len, int flags)
 {
     int r;
@@ -2396,7 +2396,7 @@ rb_w32_send(int s, const char *buf, int len, int flags)
 
 #undef sendto
 
-int 
+int WSAAPI
 rb_w32_sendto(int s, const char *buf, int len, int flags, 
 	      const struct sockaddr *to, int tolen)
 {
@@ -2414,7 +2414,7 @@ rb_w32_sendto(int s, const char *buf, int len, int flags,
 
 #undef setsockopt
 
-int 
+int WSAAPI
 rb_w32_setsockopt(int s, int level, int optname, const char *optval, int optlen)
 {
     int r;
@@ -2431,7 +2431,7 @@ rb_w32_setsockopt(int s, int level, int optname, const char *optval, int optlen)
     
 #undef shutdown
 
-int 
+int WSAAPI
 rb_w32_shutdown(int s, int how)
 {
     int r;
@@ -2488,7 +2488,7 @@ open_ifs_socket(int af, int type, int protocol)
 
 #undef socket
 
-int 
+int WSAAPI
 rb_w32_socket(int af, int type, int protocol)
 {
     SOCKET s;
@@ -2512,8 +2512,8 @@ rb_w32_socket(int af, int type, int protocol)
 
 #undef gethostbyaddr
 
-struct hostent *
-rb_w32_gethostbyaddr (const char *addr, int len, int type)
+struct hostent * WSAAPI
+rb_w32_gethostbyaddr(const char *addr, int len, int type)
 {
     struct hostent *r;
     if (!NtSocketsInitialized) {
@@ -2529,8 +2529,8 @@ rb_w32_gethostbyaddr (const char *addr, int len, int type)
 
 #undef gethostbyname
 
-struct hostent *
-rb_w32_gethostbyname (const char *name)
+struct hostent * WSAAPI
+rb_w32_gethostbyname(const char *name)
 {
     struct hostent *r;
     if (!NtSocketsInitialized) {
@@ -2546,8 +2546,8 @@ rb_w32_gethostbyname (const char *name)
 
 #undef gethostname
 
-int
-rb_w32_gethostname (char *name, int len)
+int WSAAPI
+rb_w32_gethostname(char *name, int len)
 {
     int r;
     if (!NtSocketsInitialized) {
@@ -2563,8 +2563,8 @@ rb_w32_gethostname (char *name, int len)
 
 #undef getprotobyname
 
-struct protoent *
-rb_w32_getprotobyname (const char *name)
+struct protoent * WSAAPI
+rb_w32_getprotobyname(const char *name)
 {
     struct protoent *r;
     if (!NtSocketsInitialized) {
@@ -2580,8 +2580,8 @@ rb_w32_getprotobyname (const char *name)
 
 #undef getprotobynumber
 
-struct protoent *
-rb_w32_getprotobynumber (int num)
+struct protoent * WSAAPI
+rb_w32_getprotobynumber(int num)
 {
     struct protoent *r;
     if (!NtSocketsInitialized) {
@@ -2597,8 +2597,8 @@ rb_w32_getprotobynumber (int num)
 
 #undef getservbyname
 
-struct servent *
-rb_w32_getservbyname (const char *name, const char *proto)
+struct servent * WSAAPI
+rb_w32_getservbyname(const char *name, const char *proto)
 {
     struct servent *r;
     if (!NtSocketsInitialized) {
@@ -2614,8 +2614,8 @@ rb_w32_getservbyname (const char *name, const char *proto)
 
 #undef getservbyport
 
-struct servent *
-rb_w32_getservbyport (int port, const char *proto)
+struct servent * WSAAPI
+rb_w32_getservbyport(int port, const char *proto)
 {
     struct servent *r;
     if (!NtSocketsInitialized) {
@@ -3444,6 +3444,12 @@ rb_w32_main_context(int arg, void (*handler)(int))
 
 int
 rb_w32_sleep(unsigned long msec)
+{
+    return rb_w32_Sleep(msec);
+}
+
+int WINAPI
+rb_w32_Sleep(unsigned long msec)
 {
     DWORD ret;
     RUBY_CRITICAL(ret = wait_events(NULL, msec));
diff --git a/win32/win32.h b/win32/win32.h
index d3bac885bc..228e7d282c 100644
--- a/win32/win32.h
+++ b/win32/win32.h
@@ -20,10 +20,9 @@
 
 // #include <stdarg.h> conflict with varargs.h?
 // There is function-name conflitct, so we rename it
-#if !defined(IN) && !defined(FLOAT)
+#if !defined(WSAAPI)
 #define OpenFile  WINAPI_OpenFile
 #include <winsock2.h>
-#include <windows.h>
 #undef OpenFile
 #endif
 
@@ -81,30 +80,28 @@ extern "C++" {
 #undef fputchar
 #undef utime
 #define getc(_stream)		rb_w32_getc(_stream)
+#define getchar()		rb_w32_getc(stdin)
 #define putc(_c, _stream)	rb_w32_putc(_c, _stream)
+#define putchar(_c)		rb_w32_putc(_c, stdout)
+#ifdef RUBY_EXPORT
 #define fgetc(_stream)		getc(_stream)
 #define fputc(_c, _stream)	putc(_c, _stream)
-#define getchar()		rb_w32_getc(stdin)
-#define putchar(_c)		rb_w32_putc(_c, stdout)
 #define fgetchar()		getchar()
 #define fputchar(_c)		putchar(_c)
 #define utime(_p, _t)		rb_w32_utime(_p, _t)
 
-#define strcasecmp(s1, s2)	stricmp(s1, s2)
-#define strncasecmp(s1, s2, n)	strnicmp(s1, s2, n)
-
 #define pipe(p)			_pipe(p, 2048L, O_BINARY)
 #define close(h)		rb_w32_close(h)
 #define fclose(f)		rb_w32_fclose(f)
 #define getpid()		rb_w32_getpid()
-#define sleep(x)		rb_w32_sleep((x)*1000)
+#define sleep(x)		rb_w32_Sleep((x)*1000)
+#define Sleep(msec)		(void)rb_w32_Sleep(msec)
 #ifdef __BORLANDC__
 #define creat(p, m)		_creat(p, m)
 #define eof()			_eof()
 #define filelength(h)		_filelength(h)
 #define mktemp(t)		_mktemp(t)
 #define tell(h)			_tell(h)
-#define unlink(p)		_unlink(p)
 #define write(h, b, l)		_write(h, b, l)
 #define _open			_sopen
 #define sopen			_sopen
@@ -118,7 +115,6 @@ extern "C++" {
 #define fsopen(p, m, sh)	rb_w32_fsopen(p, m, sh)
 #endif
 
-#define fsync(h)		_commit(h)
 #undef stat
 #define stat(path,st)		rb_w32_stat(path,st)
 #undef execv
@@ -134,6 +130,11 @@ extern "C++" {
 #define rmdir(p)		rb_w32_rmdir(p)
 #undef unlink
 #define unlink(p)		rb_w32_unlink(p)
+#endif
+
+#define strcasecmp(s1, s2)	stricmp(s1, s2)
+#define strncasecmp(s1, s2, n)	strnicmp(s1, s2, n)
+#define fsync(h)		_commit(h)
 
 #ifdef __MINGW32__
 struct timezone {
@@ -146,33 +147,33 @@ extern int    rb_w32_cmdvector(const char *, char ***);
 extern rb_pid_t  rb_w32_pipe_exec(const char *, const char *, int, int *);
 extern int    flock(int fd, int oper);
 extern int    rb_w32_is_socket(int);
-extern int    rb_w32_accept(int, struct sockaddr *, int *);
-extern int    rb_w32_bind(int, const struct sockaddr *, int);
-extern int    rb_w32_connect(int, const struct sockaddr *, int);
+extern int    WSAAPI rb_w32_accept(int, struct sockaddr *, int *);
+extern int    WSAAPI rb_w32_bind(int, const struct sockaddr *, int);
+extern int    WSAAPI rb_w32_connect(int, const struct sockaddr *, int);
 extern void   rb_w32_fdset(int, fd_set*);
 extern void   rb_w32_fdclr(int, fd_set*);
 extern int    rb_w32_fdisset(int, fd_set*);
-extern long   rb_w32_select(int, fd_set *, fd_set *, fd_set *, struct timeval *);
-extern int    rb_w32_getpeername(int, struct sockaddr *, int *);
-extern int    rb_w32_getsockname(int, struct sockaddr *, int *);
-extern int    rb_w32_getsockopt(int, int, int, char *, int *);
-extern int    rb_w32_ioctlsocket(int, long, u_long *);
-extern int    rb_w32_listen(int, int);
-extern int    rb_w32_recv(int, char *, int, int);
-extern int    rb_w32_recvfrom(int, char *, int, int, struct sockaddr *, int *);
-extern int    rb_w32_send(int, const char *, int, int);
-extern int    rb_w32_sendto(int, const char *, int, int, const struct sockaddr *, int);
-extern int    rb_w32_setsockopt(int, int, int, const char *, int);
-extern int    rb_w32_shutdown(int, int);
-extern int    rb_w32_socket(int, int, int);
+extern int    WSAAPI rb_w32_select(int, fd_set *, fd_set *, fd_set *, struct timeval *);
+extern int    WSAAPI rb_w32_getpeername(int, struct sockaddr *, int *);
+extern int    WSAAPI rb_w32_getsockname(int, struct sockaddr *, int *);
+extern int    WSAAPI rb_w32_getsockopt(int, int, int, char *, int *);
+extern int    WSAAPI rb_w32_ioctlsocket(int, long, u_long *);
+extern int    WSAAPI rb_w32_listen(int, int);
+extern int    WSAAPI rb_w32_recv(int, char *, int, int);
+extern int    WSAAPI rb_w32_recvfrom(int, char *, int, int, struct sockaddr *, int *);
+extern int    WSAAPI rb_w32_send(int, const char *, int, int);
+extern int    WSAAPI rb_w32_sendto(int, const char *, int, int, const struct sockaddr *, int);
+extern int    WSAAPI rb_w32_setsockopt(int, int, int, const char *, int);
+extern int    WSAAPI rb_w32_shutdown(int, int);
+extern int    WSAAPI rb_w32_socket(int, int, int);
 extern SOCKET rb_w32_get_osfhandle(int);
-extern struct hostent * rb_w32_gethostbyaddr(const char *, int, int);
-extern struct hostent * rb_w32_gethostbyname(const char *);
-extern int    rb_w32_gethostname(char *, int);
-extern struct protoent * rb_w32_getprotobyname(const char *);
-extern struct protoent * rb_w32_getprotobynumber(int);
-extern struct servent  * rb_w32_getservbyname(const char *, const char *);
-extern struct servent  * rb_w32_getservbyport(int, const char *);
+extern struct hostent *WSAAPI rb_w32_gethostbyaddr(const char *, int, int);
+extern struct hostent *WSAAPI rb_w32_gethostbyname(const char *);
+extern int    WSAAPI rb_w32_gethostname(char *, int);
+extern struct protoent *WSAAPI rb_w32_getprotobyname(const char *);
+extern struct protoent *WSAAPI rb_w32_getprotobynumber(int);
+extern struct servent  *WSAAPI rb_w32_getservbyname(const char *, const char *);
+extern struct servent  *WSAAPI rb_w32_getservbyport(int, const char *);
 extern int    rb_w32_socketpair(int, int, int, int *);
 extern char * rb_w32_getenv(const char *);
 extern int    rb_w32_rename(const char *, const char *);
@@ -288,7 +289,9 @@ extern int       setgid (rb_gid_t);
 
 extern char *rb_w32_strerror(int);
 
+#ifdef RUBY_EXPORT
 #define strerror(e) rb_w32_strerror(e)
+#endif
 
 #define PIPE_BUF 1024
 
@@ -351,21 +354,6 @@ extern char *rb_w32_strerror(int);
 #define F_SETFL 1
 #define O_NONBLOCK 1
 
-#ifdef accept
-#undef accept
-#endif
-#define accept(s, a, l)		rb_w32_accept(s, a, l)
-
-#ifdef bind
-#undef bind
-#endif
-#define bind(s, a, l)		rb_w32_bind(s, a, l)
-
-#ifdef connect
-#undef connect
-#endif
-#define connect(s, a, l)	rb_w32_connect(s, a, l)
-
 #undef FD_SET
 #define FD_SET(f, s)		rb_w32_fdset(f, s)
 
@@ -375,129 +363,95 @@ extern char *rb_w32_strerror(int);
 #undef FD_ISSET
 #define FD_ISSET(f, s)		rb_w32_fdisset(f, s)
 
+#ifdef RUBY_EXPORT
+#undef accept
+#define accept(s, a, l)		rb_w32_accept(s, a, l)
+
+#undef bind
+#define bind(s, a, l)		rb_w32_bind(s, a, l)
+
+#undef connect
+#define connect(s, a, l)	rb_w32_connect(s, a, l)
+
 #undef select
 #define select(n, r, w, e, t)	rb_w32_select(n, r, w, e, t)
 
-#ifdef getpeername
 #undef getpeername
-#endif
 #define getpeername(s, a, l)	rb_w32_getpeername(s, a, l)
 
-#ifdef getsockname
 #undef getsockname
-#endif
 #define getsockname(s, a, l)	rb_w32_getsockname(s, a, l)
 
-#ifdef getsockopt
 #undef getsockopt
-#endif
 #define getsockopt(s, v, n, o, l) rb_w32_getsockopt(s, v, n, o, l)
 
-#ifdef ioctlsocket
 #undef ioctlsocket
-#endif
 #define ioctlsocket(s, c, a)	rb_w32_ioctlsocket(s, c, a)
 
-#ifdef listen
 #undef listen
-#endif
 #define listen(s, b)		rb_w32_listen(s, b)
 
-#ifdef recv
 #undef recv
-#endif
 #define recv(s, b, l, f)	rb_w32_recv(s, b, l, f)
 
-#ifdef recvfrom
 #undef recvfrom
-#endif
 #define recvfrom(s, b, l, f, fr, frl) rb_w32_recvfrom(s, b, l, f, fr, frl)
 
-#ifdef send
 #undef send
-#endif
 #define send(s, b, l, f)	rb_w32_send(s, b, l, f)
 
-#ifdef sendto
 #undef sendto
-#endif
 #define sendto(s, b, l, f, t, tl) rb_w32_sendto(s, b, l, f, t, tl)
 
-#ifdef setsockopt
 #undef setsockopt
-#endif
 #define setsockopt(s, v, n, o, l) rb_w32_setsockopt(s, v, n, o, l)
 
-#ifdef shutdown
 #undef shutdown
-#endif
 #define shutdown(s, h)		rb_w32_shutdown(s, h)
 
-#ifdef socket
 #undef socket
-#endif
 #define socket(s, t, p)		rb_w32_socket(s, t, p)
 
-#ifdef gethostbyaddr
 #undef gethostbyaddr
-#endif
 #define gethostbyaddr(a, l, t)	rb_w32_gethostbyaddr(a, l, t)
 
-#ifdef gethostbyname
 #undef gethostbyname
-#endif
 #define gethostbyname(n)	rb_w32_gethostbyname(n)
 
-#ifdef gethostname
 #undef gethostname
-#endif
 #define gethostname(n, l)	rb_w32_gethostname(n, l)
 
-#ifdef getprotobyname
 #undef getprotobyname
-#endif
 #define getprotobyname(n)	rb_w32_getprotobyname(n)
 
-#ifdef getprotobynumber
 #undef getprotobynumber
-#endif
 #define getprotobynumber(n)	rb_w32_getprotobynumber(n)
 
-#ifdef getservbyname
 #undef getservbyname
-#endif
 #define getservbyname(n, p)	rb_w32_getservbyname(n, p)
 
-#ifdef getservbyport
 #undef getservbyport
-#endif
 #define getservbyport(p, pr)	rb_w32_getservbyport(p, pr)
 
-#ifdef socketpair
 #undef socketpair
-#endif
 #define socketpair(a, t, p, s)	rb_w32_socketpair(a, t, p, s)
 
-#ifdef get_osfhandle
 #undef get_osfhandle
-#endif
 #define get_osfhandle(h)	rb_w32_get_osfhandle(h)
 
-#ifdef getcwd
 #undef getcwd
-#endif
 #define getcwd(b, s)		rb_w32_getcwd(b, s)
 
-#ifdef getenv
 #undef getenv
-#endif
 #define getenv(n)		rb_w32_getenv(n)
 
-#ifdef rename
 #undef rename
-#endif
 #define rename(o, n)		rb_w32_rename(o, n)
 
+#undef times
+#define times(t)		rb_w32_times(t)
+#endif
+
 struct tms {
 	long	tms_utime;
 	long	tms_stime;
@@ -505,10 +459,6 @@ struct tms {
 	long	tms_cstime;
 };
 
-#ifdef times
-#undef times
-#endif
-#define times(t) rb_w32_times(t)
 int rb_w32_times(struct tms *);
 
 /* thread stuff */
@@ -522,7 +472,7 @@ int  rb_w32_getc(FILE*);
 int  rb_w32_close(int);
 int  rb_w32_fclose(FILE*);
 int  rb_w32_utime(const char *, const struct utimbuf *);
-#define Sleep(msec) (void)rb_w32_sleep(msec)
+int  WINAPI rb_w32_Sleep(unsigned long msec);
 
 /*
 == ***CAUTION***